Sidisi, Regent of the Mire, Karmic Guide, Phyrexian Altar, and Sparring Mummy

Prerequisites

• Sidisi, Regent of the Mire on the battlefield
• Karmic Guide in the graveyard
• Phyrexian Altar on the battlefield
• Sparring Mummy on the battlefield

Steps

1. Activate Sidisi by tapping it and sacrificing Sparring Mummy, returning Karmic Guide from your graveyard to the battlefield
2. When Karmic Guide enters the battlefield, it triggers, returning Sparring Mummy from your graveyard to the battlefield
3. When Sparring Mummy enters the battlefield, it triggers, untapping Sidisi
4. Activate Phyrexian Altar by sacrificing Karmic Guide
5. Repeat

Results

• Infinite LTB
• Infinite ETB
• Infinite colored mana
• Infinite sacrifice triggers
• Infinite death triggers